build error with QT 5.7.1

[Simon Frei]

I get the following error trying to build 6.1.0 with qt 5.7.1:

.../core/libs/widgets/mai
nview/dxmlguiwindow.cpp: In member function 'void
Digikam::DXmlGuiWindow::regist
erPluginsActions()':
.../core/libs/widgets/mainview/dxmlguiwindow.cpp:247:29: error:
'checkAmbiguousShortcuts' was not declared in this scope
     checkAmbiguousShortcuts();
                             ^
core/libs/widgets/CMakeFiles/digikamwidgetscore_src.dir/build.make:62:
recipe for target
'core/libs/widgets/CMakeFiles/digikamwidgetscore_src.dir/mainview/dxmlguiwindow.cpp.o'
failed
make[2]: ***
[core/libs/widgets/CMakeFiles/digikamwidgetscore_src.dir/mainview/dxmlguiwindow.cpp.o]
Error 1
CMakeFiles/Makefile2:2304: recipe for target
'core/libs/widgets/CMakeFiles/digikamwidgetscore_src.dir/all' failed
make[1]: ***
[core/libs/widgets/CMakeFiles/digikamwidgetscore_src.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

As far as I am aware 5.7.1 should still be supported, correct? Any idea
how to fix it?

Thanks in advance for any help!